package com.apache.netty.simple;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

public class NettyClientHandler extends ChannelInboundHandlerAdapter {

  /** 当通道就绪就会触发该方法 */
  @Override
  public void channelActive(ChannelHandlerContext ctx) throws Exception {
    System.out.println("client " + ctx);
    ctx.writeAndFlush(Unpooled.copiedBuffer("hello, server: (>^ω^<)喵", CharsetUtil.UTF_8));
  }

  /** 当通道有读取事件时，会触发 */
  @Override
  public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf buf = (ByteBuf) msg;
    System.out.println("服务器回复的消息:" + buf.toString(CharsetUtil.UTF_8));
    System.out.println("服务器的地址： " + ctx.channel().remoteAddress());
  }

  @Override
  public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
    cause.printStackTrace();
    ctx.close();
  }
}
